Magic lantern



2 Sheets- Sheet 1.

(No Model.)

I E. I. S. HART.

MAGIC LANTERN.

No. 484,854. Patented Oct. 25, 1892.

5? @M JM 6% (No Model.) 2 Sheets-Sheet 2.

' E. I. S. HART.

MAGIC LANTERN.

No. 484,854. Patented OQt. 25, 1892.

Z ff L J 1 z A l UNITED STATES PATENT OFFICE.

EMANUEL I. S. HART, OF NEW YORK, N. Y.

MAGIC LANTERN.

SPECIFICATION forming part of Letters Patent No. 484,854, dated October25, 1892.

Application filed February 25,1891. Serial No. 382,733. (No model.)

To all whom it may concern:

Be it known that I, EMANUEL I. S. HART, a citizen of the United States,and a resident of the city, county, and State of New York, have inventedcertain new and useful Improvements in Magic Lanterns, of which thefollowing is a specification.

My invention relates to magic lanterns or stereopticons, the lightingthereof, and supports therefor, whereby their use for exhibitionpurposes is greatly facilitated; and my invention consists in thecombination of condenser and objective lens-carriers, (each prosition inline with the center of all the lenses of the lantern exactly maintainedat no matter what slope the table may be set, all as hereinafter morefully described, reference being had to the accompanying drawings, inwhich Figure 1 is a side elevation of a magic lantern, the lens-carrierssupported each by a single standard, and the standards connected by alongitudinal bar or beam of angular cross-section passed through angularopenings in the stem of each standard. Fig. 2 is a front elevation ofobjective-mounting or carrier and standard. Fig. 3 is a front elevationof condenser-mounting with standard. Figs. 4., 5, and 6 are viewsillustrating a manner of using two lanterns at one time. Fig. 7 is alongitudinal section of the angular connecting bar or beam withsectional worm-gear in its hollow and connection of the lens-carrierstandards therewith. Fig. 8 shows in perspective a hood which may besometimes used with the lantern in case other lighting is used than thatherein provided and described. Fig.9 shows in perspective theslideholder used with this lantern and herein described. Fig. 10 showsin perspective the lantern with its table, having adjustable leg andvertical standards with the light-carrying device and counter-balance.Fig. 11 is a vertical section of the lantern-table and lightholder, thetable shown as at aslope to throw the View upward. Fig. 12 is a rearview of the adjustable leg supporting the table.

In the drawings,A indicates the mounting or lens-carrier of condenser,and B the mounting or lens-carrier of objectives, constructed as usual.

Beneath the condenser-mounting is shown a supporting-standard connectedthereto by suitable means and comprising stem a, legs I), and at c asleeve or opening of rectangular shape for reception of a lengthwiseconnecting-bar E. The objectives are also provided with asimilarstandard securedto their mounting and formed with stem at, legs I), and

sleeve 0.

At E is the lengthwise connecting-bar, of angular shape, adapted to fitsleeves cand c of the standards. Passing through both sleeves the bar Eunites the objectives and condensers, constituting them one lantern.

The rod or bar E, whendesired, is marked with a scale, as shown in Fig.4, to determine the proper distance apart at which to place theoperative parts of the lantern held by sleeves thereupon. Thumb-screwsthrough one side of each sleeve serve to secure the parts to the barwhen set.

In Fig. 7 the bar E is shown with sleeves c and c thereon in section.The bar is hol low, and within the hollow I arrange a threaded rod Z,whereby the sleeve 0 may be moved forward or backward, and at m anotherthreaded rod, encircling a reduced portion or shank of rod Z, wherebythe sleeve 0 may be moved forward or backward. I also, when desired, addthereto another threaded rod n, encircling a shank of rod m, wherebyanother sleeve e may be moved. Such sleeve may sustain a lighting devicewhen one is used distinct from the device herein described. By means ofthe rod so constructed the distances apart of the operative parts of thelantern projecting the picture may be readily adjusted by turning headsor buttons at 0, of

which I have shown three, each connected with one of the threaded rods,so that each may be revolved separately or all revolved together, asdesired. The angular bar E may also be used without the threaded rodsinside, if desired; but when using said'threaded rods thumb-screws tosecure the sleeves may be dispensed with. A pin passed through a hole ineach sleeve ora lug forming a part thereof will form a means ofconnecting the sleeves to enable the engagement of the threadstherewith. The top of the bar E is slotted to permit of the connectionand allow the movement.

The slide-holder shown in Fig. 9 is used with this lantern. It is formedwith a spring for keeping the slide close to the face of thecondenser-mounting. The spring is made in two parts, of metal. At thetop the two parts meet, as at p, where a thumb-screw passing through thetwo ends of the spring (expanded to receive the same) affords means ofclosing or spreading the spring to enable it to fit slides ofvaryingsizes.

In Fig. 10 is shown a support for the lantern, comprising a shelf K, itsrear end hinged to two uprights L, and at its outer end .provided withan adjustable leg formed in two parts Maud M. The part M is slotted, asshown by back view, Fig. 12. Athumb-screw N, passing through parts M andM, secures the two parts together at any point. By this means the shelfmay be tilted or sloped upward, as in Fig. 11, or downward, as the legis lengthened or shortened by sliding one of the parts over the otherand tightening the screw. The uprights L are formed hollow to contain abalance-weight each, as shown at L, Fig. 10. A cord or chain from eachweight, passing over a pulley at L (to each upright,) extending outsideand downward to be connected to any lamp or other lighting means, servesas a carrier. Grooves or cleats at L lighter to a direct vertical line.

This apparatus so constructed affords a susof all the lenses at whateverangle the lantern may be placed.

What I claim, and desire to secure by Letters Patent, is

1. A magic lantern in which the condenser and objective shells ormountings are adj ustably and solely connected by a single bar extendinglongitudinally through the standards supporting each, the bar angular inshape and fitted to an angular opening through each standard, as setforth.

2. In a magic lantern, the combination of condenser-shell A, providedwith a bottom standard at, having legs 17, sleeve 0, and setscrew d,objective-shell B, provided with standard 0,, having legs I), sleeves c,and setscrew d, and longitudinal connecting-bar E, of angularcross-section, extending through sleeves e and c, essentially as shownand described.

3. In combination with the sustaining-standards of a magic lantern, ahollow connectingbar extending longitudinally through said standards andhavingin its hollow a sectional worm, the sections formed and arrangedto be operated individually or collectively, as set forth.

4. The combination of a magic lantern with a lighting device suspendedby a counter-balance, whereby the light and center or axis of all thelenses in the lantern are brought and adj ustably kept in directline,'as set forth.

5. The combination of a magic lantern with a lighting device suspendedby a counter-balance, the lantern resting upon atable or shelf K, andthe table supported at one end by hollow standards L and its other endby adjustable leg formed in two parts M :and M, united by screw N,andthe, standards L, provided with cords L and weights L, whereby alighting device held thereby can be raised and lowered to enable theoperator to bring the light to coincide with the center of all thelenses of the lantern in longitudinal line at whatever slope the table Kmay beplaced, as set forth.

EMANUEL I. S. HART.

In presence of J. 0. MCCORMICK, THOMAS ENNIS.

